This is all the information I have. It is from "The Bullion Bar Book" by Jerry Cestkowski.

The obverse from the pics of the 2 bars in the poll look like a Johnson Matthey obverse, as do the 2 pics from Jerry's book, one of which is actually Johnson Matthey.

I have a couple of thoughts about this. The first is perhaps after the initial JM bars were released, Citibank didn't choose to promote JM as the producer and waste that valuable space on the reverse of the bar - the marketing people might have said "Let's put out logo there instead".

They might have even knocked a couple of cents off of the production costs of the bar by using their own die and giving-up the affiliation with JM.

My thoughts are that Johnson Matthey did in fact produce those Citibank bars for Citibank. The font is pretty much, if not identical as a Johnson Matthey branded bar. Serial number font as well.

I have had a few over the years, they do not fetch nearly as much as the Johnson Matthey branded ones do though $30 - $50. Last JM branded one fetched crazy money $200+ at auction if I recall correctly.

I have had various pieces over the years that were in fact made by Johnson Matthey but had no Johnson Matthey markings on them anywhere, only way to know was if it had a matching assay card with it.